/*
 * Copyright (C) 2009 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.hddz.comlib.ui.base.quicksearchbox;

import java.util.HashSet;

import android.util.Log;

/**
 * A SuggestionCursor that is backed by a list of SuggestionPosition objects and
 * doesn't allow duplicate suggestions.
 */
public class ListSuggestionCursorNoDuplicates extends ListSuggestionCursor
{
	private static final boolean	DBG	= false;
	private static final String		TAG	= "QSB.ListSuggestionCursorNoDuplicates";
	private final HashSet<String>	mSuggestionKeys;

	public ListSuggestionCursorNoDuplicates(String userQuery)
	{
		super(userQuery);
		mSuggestionKeys = new HashSet<String>();
	}

	@Override
	public boolean add(SuggestionPosition suggestionPos)
	{
		String key = suggestionPos.current().getSuggestionKey();
		if (mSuggestionKeys.add(key))
		{
			return super.add(suggestionPos);
		}
		else
		{
			if (DBG)
				Log.d(TAG, "Rejecting duplicate " + key);
			return false;
		}
	}
}
